Enemies Among Us
Head to the Gallows and speak with Hugh to discover that one of the Templars, Wilmond, vanished but has suddenly re-appeared again. Head out to the Free Marches and into Wilmond's camp.
The Templar is possessed by demons and you'll be forced to kill him and the abominations he summons. You also have the assistance of the Knight-Commander Cullen for this battle. Use ice magic and focus on the Rage Demon that will eventually arrive. After killing Wilmond, return to Kirkwall.
If you don't already have a mage in the party switch one in now. Head to the Blooming Ross in High Town and talk to the workers. Talk to the prostitute Idunna and she will use magic to take over your mind. Use one of your mages to break free from her control, but be sure to spare her life so that she can be met later.
Head to the Sanctuary in Darktown and fight through the Shades inside. You'll eventually find the captured Keran and the blood mages that took him. These blood mages start in a huddle, so be sure to nuke them with heavy area of effect attacks before they are able to spread out. Heal up from any damage you have and then concentrate on the remaining demons that spawn out. The desire demon should be tanked while you concentrate attacks on the weaker shades and abominations.
With Keran saved, return to the Gallows and report to Cullen. It's up to you to decide if Keran is really human any more: either let him remain in the Templars or have him expelled.
